L99LDLH32 datasheet(43/142 Pages) STMICROELECTRONICS

Part #	L99LDLH32

Description	32-channel LED driver with automotive CAN FD Light interface

PDF	142 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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43 / 142 page

DS12879 Rev 6

43/142

L99LDLH32

Communication interface

141

Figure 16. CAN FD Light compatible Communication and Protocol Controller

6.3

Data link layer

The L99LDLH32 supports data exchange at a bit rate of 1Mb/s.

The communication is checked for safety reasons: a CRC value is sent with each data

frame, supporting ASIL B requirements.

After every frame all recipients send an acknowledge bit so at least one is received by the

sender so it can detect if it is still connected to the network.

Since all participants of the network are connected to the same wire, a transmitter is able to

detect if it is not correctly operating - consequently entering passive state not to disturb the

bus communication.

The data sampling clock is generated in each receiver individually, therefore a minimum

edge density of the data stream is guaranteed such that at least every 10th bit a recessive

to dominant edge is present so a synchronization of the receiver to the data stream is

possible.

L99LDLH32 Datasheet(PDF) 43 Page - STMicroelectronics